Zolakwika wamba ndi momwe mungapewere?
Zowonongeka zodziwika pakupanga ma brake disc: dzenje la mpweya, shrinkage porosity, dzenje la mchenga, etc; Sing'anga ndi mtundu graphite mu dongosolo metallographic kuposa muyezo, kapena carbide kuchuluka muyezo; Kuuma kwambiri kwa Brinell kumabweretsa zovuta kukonza kapena kuuma kosagwirizana; Mapangidwe a graphite ndi ovuta, mawotchi amawongoleredwa sakhala ofanana, nkhanza zimakhala zosauka pambuyo pokonza, ndipo porosity yodziwikiratu pamtunda woponyera imapezekanso nthawi ndi nthawi.
1. Kupanga ndi kuteteza mabowo a mpweya: mabowo a mpweya ndi chimodzi mwa zolakwika zofala kwambiri za ma brake disc castings. Ziwalo za ma brake disc ndizochepa komanso zoonda, kuzirala komanso kulimbitsa liwiro kumathamanga, ndipo maenje a mpweya wa mpweya ndi maenje otakataka ndi ochepa. Mafuta opangira mafuta opangira mchenga ali ndi m'badwo waukulu wa gasi. Ngati chinyontho cha nkhungu ndi chambiri, zinthu ziwirizi nthawi zambiri zimabweretsa pores zowononga poponya. Zimapezeka kuti ngati chinyontho cha mchenga woumba chimaposa, kuchuluka kwa porosity scrap kumawonjezeka kwambiri; M'mizere yopyapyala yamchenga, kutsamwitsa (kutsamwitsa pores) ndi ma pores (zipolopolo) nthawi zambiri zimawonekera. Pamene utomoni wokutira mchenga otentha pachimake njira bokosi ntchito, pores ndi aakulu kwambiri chifukwa cha m'badwo waukulu mpweya; Nthawi zambiri, chimbale ananyema ndi wandiweyani mchenga pachimake kawirikawiri amakhala mpweya dzenje chilema;
2. Kupanga dzenje la mpweya: mpweya wopangidwa ndi chigawo cha mchenga cha disc cha brake disc kuponyera kutentha kwakukulu kumatuluka kunja kapena mkati mopingasa kupyolera mumchenga wapakati pazikhalidwe zabwinobwino. Dongosolo la mchenga la disc limakhala locheperako, njira ya gasi imakhala yopapatiza ndipo kukana kwamadzi kumawonjezeka. Nthawi ina, pamene chitsulo chosungunula chimamira mwamsanga pakatikati pa mchenga wa disc, mpweya wambiri udzaphulika; Kapena kutentha kwachitsulo chosungunuka kukhudzana ndi madzi ochuluka a mchenga (kusakanikirana kwa mchenga) pamalo ena, kuchititsa kuphulika kwa mpweya, kutsamwitsa moto ndi kupanga pores; Munjira inanso, mpweya wopangidwa ndi mphamvu yamphamvuyo umaloŵa m’chitsulocho n’kuyandama n’kuthawa. Pamene nkhungu silingathe kuitulutsa mu nthawi, mpweya udzafalikira mu mpweya wosanjikiza pakati pa chitsulo chosungunula ndi m'munsi mwa nkhungu yapamwamba, yomwe imatenga gawo la danga pamwamba pa chimbale. Ngati chitsulo chosungunula chikumangirira, kapena kukhuthala kwake kuli kwakukulu ndikutaya madzi, malo omwe mpweyawo umakhala sangadzazidwenso, udzasiya pores pamwamba. Nthawi zambiri, ngati mpweya kwaiye pachimake sangathe kuyandama mmwamba ndi kuthawa mwa chitsulo chosungunula mu nthawi, izo adzakhala pamwamba pamwamba pa chimbale, nthawi zina poyera ngati pore limodzi, nthawi zina poyera pambuyo kuwombera kuphulika kuchotsa sikelo oxide, ndipo nthawi zina amapezeka pambuyo Machining, amene adzachititsa kuwononga maola processing. Pamene ma brake disc core ndi okhuthala, zimatenga nthawi yayitali kuti chitsulo chosungunula chikwere pakatikati pa disc ndikumiza pakati pa disc. Asanayambe kumizidwa, mpweya wopangidwa ndi pachimake umakhala ndi nthawi yochuluka yoyenda momasuka kumtunda wapamwamba wa pachimake kupyolera mumchenga wa mchenga, ndipo kukana kutuluka kunja kapena mkati mwa njira yopingasa kumakhala kochepa. Chifukwa chake, zolakwika za pore sizimapangidwa kawirikawiri, koma ma pores omwe amadzipatula amathanso kuchitika. Ndiko kunena kuti, pali kukula kofunikira kuti apange pores choking kapena pores pamwamba pakati pa makulidwe ndi makulidwe a pachimake mchenga. Pamene makulidwe a pachimake cha mchenga ndi ocheperapo kukula kovutaku, padzakhala chizolowezi chachikulu cha pores. Kukula kofunikiraku kumawonjezeka ndi kuwonjezeka kwa radial dimension ya brake disc komanso ndi kupatulira kwapakati pa disc. Kutentha ndi chinthu chofunikira chomwe chimakhudza porosity. Chitsulo chosungunuka chimalowa mu nkhungu kuchokera mkati mwa sprue, chimadutsa pakati pakatikati podzaza chimbale, ndipo chimakumana moyang'anizana ndi sprue wamkati. Chifukwa cha nthawi yayitali, kutentha kumachepa kwambiri, ndipo kukhuthala kumawonjezeka moyenerera, nthawi yabwino yoti thovu liyandama ndi kutulutsa ndi lalifupi, ndipo chitsulo chosungunula chidzakhazikika mpweya usanatuluke, kotero kuti pores ndizovuta kuchitika. Choncho, nthawi yogwira ntchito yoyandama ndi kutulutsa mpweya imatha kuwonjezereka powonjezera kutentha kwachitsulo chosungunuka pa disc moyang'anizana ndi sprue wamkati.
